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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     * <a name="line.8"></a>
<FONT color="green">009</FONT>     *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     * <a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    package org.apache.commons.lang3.text.translate;<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    import java.io.IOException;<a name="line.19"></a>
<FONT color="green">020</FONT>    import java.io.Writer;<a name="line.20"></a>
<FONT color="green">021</FONT>    import java.util.Arrays;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.util.EnumSet;<a name="line.22"></a>
<FONT color="green">023</FONT>    <a name="line.23"></a>
<FONT color="green">024</FONT>    /**<a name="line.24"></a>
<FONT color="green">025</FONT>     * Translate XML numeric entities of the form &amp;#[xX]?\d+;? to <a name="line.25"></a>
<FONT color="green">026</FONT>     * the specific codepoint.<a name="line.26"></a>
<FONT color="green">027</FONT>     *<a name="line.27"></a>
<FONT color="green">028</FONT>     * Note that the semi-colon is optional.<a name="line.28"></a>
<FONT color="green">029</FONT>     * <a name="line.29"></a>
<FONT color="green">030</FONT>     * @since 3.0<a name="line.30"></a>
<FONT color="green">031</FONT>     * @version $Id: NumericEntityUnescaper.java 1199894 2011-11-09 17:53:59Z ggregory $<a name="line.31"></a>
<FONT color="green">032</FONT>     */<a name="line.32"></a>
<FONT color="green">033</FONT>    public class NumericEntityUnescaper extends CharSequenceTranslator {<a name="line.33"></a>
<FONT color="green">034</FONT>    <a name="line.34"></a>
<FONT color="green">035</FONT>        public static enum OPTION { semiColonRequired, semiColonOptional, errorIfNoSemiColon }<a name="line.35"></a>
<FONT color="green">036</FONT>    <a name="line.36"></a>
<FONT color="green">037</FONT>        // TODO?: Create an OptionsSet class to hide some of the conditional logic below<a name="line.37"></a>
<FONT color="green">038</FONT>        private final EnumSet&lt;OPTION&gt; options;<a name="line.38"></a>
<FONT color="green">039</FONT>    <a name="line.39"></a>
<FONT color="green">040</FONT>        /**<a name="line.40"></a>
<FONT color="green">041</FONT>         * Create a UnicodeUnescaper.<a name="line.41"></a>
<FONT color="green">042</FONT>         *<a name="line.42"></a>
<FONT color="green">043</FONT>         * The constructor takes a list of options, only one type of which is currently <a name="line.43"></a>
<FONT color="green">044</FONT>         * available (whether to allow, error or ignore the semi-colon on the end of a <a name="line.44"></a>
<FONT color="green">045</FONT>         * numeric entity to being missing).<a name="line.45"></a>
<FONT color="green">046</FONT>         *<a name="line.46"></a>
<FONT color="green">047</FONT>         * For example, to support numeric entities without a ';':<a name="line.47"></a>
<FONT color="green">048</FONT>         *    new NumericEntityUnescaper(NumericEntityUnescaper.OPTION.semiColonOptional)<a name="line.48"></a>
<FONT color="green">049</FONT>         * and to throw an IllegalArgumentException when they're missing:<a name="line.49"></a>
<FONT color="green">050</FONT>         *    new NumericEntityUnescaper(NumericEntityUnescaper.OPTION.errorIfNoSemiColon)<a name="line.50"></a>
<FONT color="green">051</FONT>         *<a name="line.51"></a>
<FONT color="green">052</FONT>         * Note that the default behaviour is to ignore them. <a name="line.52"></a>
<FONT color="green">053</FONT>         *<a name="line.53"></a>
<FONT color="green">054</FONT>         * @param options to apply to this unescaper<a name="line.54"></a>
<FONT color="green">055</FONT>         */<a name="line.55"></a>
<FONT color="green">056</FONT>        public NumericEntityUnescaper(OPTION... options) {<a name="line.56"></a>
<FONT color="green">057</FONT>            if(options.length &gt; 0) {<a name="line.57"></a>
<FONT color="green">058</FONT>                this.options = EnumSet.copyOf(Arrays.asList(options));<a name="line.58"></a>
<FONT color="green">059</FONT>            } else {<a name="line.59"></a>
<FONT color="green">060</FONT>                this.options = EnumSet.copyOf(Arrays.asList(new OPTION[] { OPTION.semiColonRequired }));<a name="line.60"></a>
<FONT color="green">061</FONT>            }<a name="line.61"></a>
<FONT color="green">062</FONT>        }<a name="line.62"></a>
<FONT color="green">063</FONT>    <a name="line.63"></a>
<FONT color="green">064</FONT>        /**<a name="line.64"></a>
<FONT color="green">065</FONT>         * Whether the passed in option is currently set.<a name="line.65"></a>
<FONT color="green">066</FONT>         *<a name="line.66"></a>
<FONT color="green">067</FONT>         * @param option to check state of<a name="line.67"></a>
<FONT color="green">068</FONT>         * @return whether the option is set<a name="line.68"></a>
<FONT color="green">069</FONT>         */<a name="line.69"></a>
<FONT color="green">070</FONT>        public boolean isSet(OPTION option) { <a name="line.70"></a>
<FONT color="green">071</FONT>            return options == null ? false : options.contains(option);<a name="line.71"></a>
<FONT color="green">072</FONT>        }<a name="line.72"></a>
<FONT color="green">073</FONT>    <a name="line.73"></a>
<FONT color="green">074</FONT>        /**<a name="line.74"></a>
<FONT color="green">075</FONT>         * {@inheritDoc}<a name="line.75"></a>
<FONT color="green">076</FONT>         */<a name="line.76"></a>
<FONT color="green">077</FONT>        @Override<a name="line.77"></a>
<FONT color="green">078</FONT>        public int translate(CharSequence input, int index, Writer out) throws IOException {<a name="line.78"></a>
<FONT color="green">079</FONT>            int seqEnd = input.length();<a name="line.79"></a>
<FONT color="green">080</FONT>            // Uses -2 to ensure there is something after the &amp;#<a name="line.80"></a>
<FONT color="green">081</FONT>            if(input.charAt(index) == '&amp;' &amp;&amp; index &lt; seqEnd - 2 &amp;&amp; input.charAt(index + 1) == '#') {<a name="line.81"></a>
<FONT color="green">082</FONT>                int start = index + 2;<a name="line.82"></a>
<FONT color="green">083</FONT>                boolean isHex = false;<a name="line.83"></a>
<FONT color="green">084</FONT>    <a name="line.84"></a>
<FONT color="green">085</FONT>                char firstChar = input.charAt(start);<a name="line.85"></a>
<FONT color="green">086</FONT>                if(firstChar == 'x' || firstChar == 'X') {<a name="line.86"></a>
<FONT color="green">087</FONT>                    start++;<a name="line.87"></a>
<FONT color="green">088</FONT>                    isHex = true;<a name="line.88"></a>
<FONT color="green">089</FONT>    <a name="line.89"></a>
<FONT color="green">090</FONT>                    // Check there's more than just an x after the &amp;#<a name="line.90"></a>
<FONT color="green">091</FONT>                    if(start == seqEnd) {<a name="line.91"></a>
<FONT color="green">092</FONT>                        return 0;<a name="line.92"></a>
<FONT color="green">093</FONT>                    }<a name="line.93"></a>
<FONT color="green">094</FONT>                }<a name="line.94"></a>
<FONT color="green">095</FONT>    <a name="line.95"></a>
<FONT color="green">096</FONT>                int end = start;<a name="line.96"></a>
<FONT color="green">097</FONT>                // Note that this supports character codes without a ; on the end<a name="line.97"></a>
<FONT color="green">098</FONT>                while(end &lt; seqEnd &amp;&amp; ( input.charAt(end) &gt;= '0' &amp;&amp; input.charAt(end) &lt;= '9' ||<a name="line.98"></a>
<FONT color="green">099</FONT>                                        input.charAt(end) &gt;= 'a' &amp;&amp; input.charAt(end) &lt;= 'f' ||<a name="line.99"></a>
<FONT color="green">100</FONT>                                        input.charAt(end) &gt;= 'A' &amp;&amp; input.charAt(end) &lt;= 'F' ) )<a name="line.100"></a>
<FONT color="green">101</FONT>                {<a name="line.101"></a>
<FONT color="green">102</FONT>                    end++;<a name="line.102"></a>
<FONT color="green">103</FONT>                }<a name="line.103"></a>
<FONT color="green">104</FONT>    <a name="line.104"></a>
<FONT color="green">105</FONT>                boolean semiNext = end != seqEnd &amp;&amp; input.charAt(end) == ';';<a name="line.105"></a>
<FONT color="green">106</FONT>    <a name="line.106"></a>
<FONT color="green">107</FONT>                if(!semiNext) {<a name="line.107"></a>
<FONT color="green">108</FONT>                    if(isSet(OPTION.semiColonRequired)) {<a name="line.108"></a>
<FONT color="green">109</FONT>                        return 0;<a name="line.109"></a>
<FONT color="green">110</FONT>                    } else<a name="line.110"></a>
<FONT color="green">111</FONT>                    if(isSet(OPTION.errorIfNoSemiColon)) {<a name="line.111"></a>
<FONT color="green">112</FONT>                        throw new IllegalArgumentException("Semi-colon required at end of numeric entity");<a name="line.112"></a>
<FONT color="green">113</FONT>                    }<a name="line.113"></a>
<FONT color="green">114</FONT>                }<a name="line.114"></a>
<FONT color="green">115</FONT>    <a name="line.115"></a>
<FONT color="green">116</FONT>                int entityValue;<a name="line.116"></a>
<FONT color="green">117</FONT>                try {<a name="line.117"></a>
<FONT color="green">118</FONT>                    if(isHex) {<a name="line.118"></a>
<FONT color="green">119</FONT>                        entityValue = Integer.parseInt(input.subSequence(start, end).toString(), 16);<a name="line.119"></a>
<FONT color="green">120</FONT>                    } else {<a name="line.120"></a>
<FONT color="green">121</FONT>                        entityValue = Integer.parseInt(input.subSequence(start, end).toString(), 10);<a name="line.121"></a>
<FONT color="green">122</FONT>                    }<a name="line.122"></a>
<FONT color="green">123</FONT>                } catch(NumberFormatException nfe) {<a name="line.123"></a>
<FONT color="green">124</FONT>                    return 0;<a name="line.124"></a>
<FONT color="green">125</FONT>                }<a name="line.125"></a>
<FONT color="green">126</FONT>    <a name="line.126"></a>
<FONT color="green">127</FONT>                if(entityValue &gt; 0xFFFF) {<a name="line.127"></a>
<FONT color="green">128</FONT>                    char[] chrs = Character.toChars(entityValue);<a name="line.128"></a>
<FONT color="green">129</FONT>                    out.write(chrs[0]);<a name="line.129"></a>
<FONT color="green">130</FONT>                    out.write(chrs[1]);<a name="line.130"></a>
<FONT color="green">131</FONT>                } else {<a name="line.131"></a>
<FONT color="green">132</FONT>                    out.write(entityValue);<a name="line.132"></a>
<FONT color="green">133</FONT>                }<a name="line.133"></a>
<FONT color="green">134</FONT>    <a name="line.134"></a>
<FONT color="green">135</FONT>                return 2 + end - start + (isHex ? 1 : 0) + (semiNext ? 1 : 0);<a name="line.135"></a>
<FONT color="green">136</FONT>            }<a name="line.136"></a>
<FONT color="green">137</FONT>            return 0;<a name="line.137"></a>
<FONT color="green">138</FONT>        }<a name="line.138"></a>
<FONT color="green">139</FONT>    }<a name="line.139"></a>




























































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